fn make_atm():fn(int):int {
    var cash = 1000
    return fn(int amount):int {
        cash -= amount
        return cash
    }
}

var atm1_draw = make_atm()
var atm2_draw = make_atm()

println(atm1_draw(100))
println(atm1_draw(100))
println(atm2_draw(100))
println(atm2_draw(100))